路由类型 | 通告 方法 |
TLV | up/down位 | 度量类型 Metric-type |
描述 | 备注 |
L1 intra-area routes L1区域内路由-内部度量 |
L1 LSP | TLV 128 IP Internal Reachability Information TLVs |
置0 | internal | IP前缀直连到通告路由器 | |
L1 external routes L1外部路由-内部度量 |
L1 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | internal | IP前缀从其他IGP学习,通常不直连通告路由器 | |
L2 intra-area routes L2区域内路由-内部度量 |
L2 LSP | TLV 128 IP Internal Reachability Information TLVs |
置0 | internal | IP前缀直连到通告路由器 | 无法与 L1->L2区域间路由-内部度量 区分 |
L2 external routes L2外部路由-内部度量 |
L2 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | internal | IP前缀从其他IGP学习,通常不直连通告路由器 | 无法与 L1->L2区域间外部路由-内部度量 区分 |
L1->L2 inter-area routes L1->L2区域间路由-内部度量 |
L2 LSP | TLV 128 IP Internal Reachability Information TLVs |
置0 | internal | IP前缀通过L1路由学习,在L2区域通告 | 无法与 L2区域内路由-内部度量 区分 |
L1->L2 inter-area external routes L1->L2区域间外部路由-内部度量 |
L2 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | internal | IP前缀通过L1路由学习,在L2区域通告 | 无法与 L2外部路由-内部度量 区分 |
L2->L1 inter-area routes L2->L1区域间路由-内部度量 |
L1 LSP | TLV 128 IP Internal Reachability Information TLVs |
置1 | internal | IP前缀通过L2路由学习,在L1区域通告 | |
L2->L1 inter-area external routes L2->L1区域间外部路由-内部度量 |
L1 LSP | TLV 130 IP External Reachability Information TLVs |
置1 | internal | IP前缀通过L2路由学习,在L1区域通告 | |
L1 external routes with external metric L1外部路由-外部度量 |
L1 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | external | IP前缀从其他IGP学习,通常不直连通告路由器 | |
L2 external routes with external metric L2外部路由-外部度量 |
L2 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | external | IP前缀从其他IGP学习,通常不直连通告路由器 | 无法与 L1->L2区域间外部路由-外部度量 区分 |
L1->L2 inter-area external routes with external metric L1->L2区域间外部路由-外部度量 |
L2 LSP | TLV 130 IP External Reachability Information TLVs |
置0 | external | IP前缀通过L1路由学习,在L2区域通告 | 无法与 L2外部路由-外部度量 区分 |
L2->L1 inter-area external routes with external metric L2->L1区域间外部路由-外部度量 |
L1 LSP | TLV 130 IP External Reachability Information TLVs |
置1 | external | IP前缀通过L2路由学习,在L1区域通告 |
选路原则:
同优先级,metric小优先!
1 | L1 intra-area routes with internal metric L1 external routes with internal metric |
L1区域内路由-内部度量 L1外部路由-内部度量 |
2 | L2 intra-area routes with internal metric L2 external routes with internal metric L1->L2 inter-area routes with internal metric L1->L2 inter-area external routes with internal metric |
L2区域内路由-内部度量 L2外部路由-内部度量 L1->L2区域间路由-内部度量 L1->L2区域间外部路由-内部度量 |
3 | L2->L1 inter-area routes with internal metric L2->L1 inter-area external routes with internal metric |
L2->L1区域间路由-内部度量 L2->L1区域间外部路由-内部度量 |
4 | L1 external routes with external metric | L1外部路由-外部度量 |
5 | L2 external routes with external metric L1->L2 inter-area external routes with external metric |
L2外部路由-外部度量 L1->L2区域间外部路由-外部度量 |
6 | L2->L1 inter-area external routes with external metric | L2->L1区域间外部路由-外部度量 |